import std.stdio;
import std.stream;
import std.stdio;
import dtl.io.stream_range;

void main(string[] args) {
  writefln("Hello World!");
  auto r = new int[3];
  int[] r2 = r[1..2];
  r[1] = 3;
  writefln("%d %d",r[1], r2[0]);
  r2.length = 10;
  r[1] = 4;
  writefln("%d %d",r[1], r2[0]);
  writefln("%d %d",r.length, r2.length);
}
